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carbon steel tee product specifications 1.Material:Carbon Steel: ASTM A234 WPB, WPC ASTM A105 WPHY 42, 46, 52, 56, 60, 65, 70, 80 2.Standard: GB/T12459-2005,GB/T13401-2005,ASME B16.9,SH3408,SH3409-96...